co-sister-in-law 

Spouse's sibling's wife.

My co-sister-in-law is a good person.

co-sister-in-law by Wonbig October 13, 2021

Hot sister 

Saying nice things about someone’s sister

Your hot sister is lesbian

Hot sister by Mitch McConnell June 24, 2022

fallen sister

any girl of asian descent who exclusively dates white men

you see how jessica exclusively dates white guys? she's the definition of a fallen sister

fallen sister by kingdinosaur September 14, 2022

autumn aspens sister 

Chris things shes like super hot and she is aspens sister

Chris: hey autumn aspens sister, your pretty hot

autumn aspens sister by itsjasonlol February 26, 2019

Kyle's Sister 

Kyle's sister likes all men

Kyle's sister is a milf

Kyle's Sister by Urmansminehunny September 2, 2019

Tony's Sister 

She will kick your ass. It even said it in tony's instagram story! Watch your ass cause she's probably gonna kick it!

Krispy: Hey don't fuck with tony's sister
Tay: Why?
Krispy: Tony's sister will kick your ass.

Tony's Sister by Rheumatism May 12, 2020

Conor spargos sister 

Ninja ninja turtles ninja ninja turtle ninja ninja turtles ninja ninja turtle ninja ninja turtles ninja

No problem bro I’m just trying my own car for my phone to work so I’ll Conor spargos sister see if my boss comes out on me or do anything on it and I’m just trying and not have it in my room so it’s gonna and it’s a lot more fun to do and that I’m going out

Conor spargos sister by Sub to xd scatman February 26, 2021